化肥减施下土壤改良剂DK-1对设施丝瓜生长及土壤性状的影响

为研究DK-1型土壤改良剂对设施蔬菜生长及土壤性状的影响,进行了本次田间试验。本研究共设置4个处理,分别为:T1(不施用任何肥料)、T2(常规施肥处理)、T3(常规施肥处理配施土壤改良剂)和T4(化肥减施20%并配施土壤改良剂)。试验结果表明,土壤改良剂的施用具有促进丝瓜产量提升的潜力,T3较T2处理丝瓜产量增加9.89%;T3处理作物茎粗也有所增加,较T2和T4处理分别增加了13.22%和14.56%;各处理对丝瓜SPAD值的影响不大;土壤改良剂的添加可以显著促进土壤pH值的增加,T3和T4处理土壤pH值分别比T1处理土壤pH值增加了4.79%和5.39%;同时DK-1的添加可以显著降低土壤EC值,T3和T4处理土壤EC值均显著小于T2处理,分别降低了32.26%和23.66%。综上所述,化肥减施并配施DK-1型土壤改良剂,促进丝瓜植株生长、产量的提升和土壤理化性质的改善,均具有较强的可操作性,是设施蔬菜连作障碍防控的有效手段之一。

Effects of Soil Amendment DK-1 on Protected Luffa Growth and Soil Properties under Reduced Application of Chemical Fertilizer

Taking luffa as material,the test was carried out to study the effects of DK-1 soil amendment on growth and soil properties of protected vegetables under reduced application of chemical fertilizer.The results showed that the application of soil amendment had the potential to improve the yield of luffa,and the yield of luffa increased by 9.89% in T3 treatment(conventional fertilizer with soil improver)compared with that of T2 treatment(conventional fertilizer).The stem diameter of luffa plant increased by 13.22% and 14.56% in T3 treatment compared with those of T2 treatment and T4 treatment(20% fertilizer reduction with soil improver)respectively,and the effects of each treatment on SPAD value of luffa were not significant.The addition of soil amendment could significantly promote the increase of soil pH value,manifested by T3 and T4 treatment,and their soil pH values were 4.79% and 5.39% higher than that of T1 treatment(no fertilizer)respectively.At the same time,the addition of DK-1 could significantly reduce soil EC value,while in T3 and T4 treatment,their soil EC values were 32.26% and 23.66% significantly lower than that of T2 treatment,respectively.In conclusion,it is feasible to reduce fertilizer and apply DK-1 soil amendment to promote the growth of luffa plants,increase the yield and improve the physical and chemical properties of soil,and it is an effective mean to prevent and control the continuous cropping obstacles of protected vegetables.